Forging machine



Nov. 22, 1927. 1,650,581

- 5. T. NEQLSON FORGING MACHINE Nov. 22, 192 7.

S T.- NELoN FORGING MACHINE 2 Sheets-Sheet 2 patented Nov, 1927.

2 1,650,581 hillD STATES PATENT OFFICE.

EVEN T. NELSON, OE? IViliCi-IIGAN CITY, INDIANA, ASSIC-{IIOR T SULLIVANMACI-I INERY COMPANY, A GORPQRATION 0F MASSACHUSETTS.

' ronerne Application filed November My invention relates to forgingmachines, and more particularly to forging machines of the type adaptedto form cutter bits for coal mining machines An object of my inventionis to provide an improved. forging machine. Another object of myinvention is to provide an improved forging machine of the typeadaptedto form heated blanks into cutter bits for coal mining machines.A further object of my. invention is to provide an improved forgingmachine which by aseries of steps may operate upon a heated blank andform it into a shape appropriate for use as a coal mining machine cutterbit. Other objects of my invention will hereinafter more fully appear.

In the accompanying drawings, I have shown for purposes of illustration,one form which my invention may assume in practice.

In these drawings,-

Figure 1 is a side elevation of a forging machine embodying myinvention.

Fig. 2 is a front view thereof. I

Fig. 3 is a view partially in elevation and partially in verticalsection on the line 3-;3 of Fig. 2.

Fig. 1 is a transverse central section on the line 4-4l of Fig. 1.

Fig. 5 is a detail of construction.

In the illustrative embodiment of my in:- proved forging macl'iine Ihave shown it comprising a frame 1 in which is journaled upon a suitableshaft 2 a rotating bit carrying member 3 which cooperates with a seriesof rotatable dies generally indicated at l. The carrier memberfi iscircular in periphcry and is supported by a suitable web 5 upon a hub 6secured. to and rotatable with the shaft 2. The carrier member 3 islikewise provided with a series of blank receiving slots 7 in whichheated blanksare adapt ed to be dropped. These slots are rearwardlyinclined and have arranged adjacent their rearward sides. speaking inter nsof the direction of rotation, dies 8 inset in the periphery of thebit carrier and comprising surfaces 9 inclined to the direction of. theslot 7 and adapted to giveform to the. front side of the cutting(BlKl'Of thecutter iitsf The heated blanks indicated in construction at10 (Fig. 3) adapted tobe shoved into the slots 7 duringthe rotation ofthe carrier member land the distance which theymav be inserted iscontrolled by a pairof adjustable MACHINE.

3, 1921. Serial No. 512,676.

semicircular blocks 11 disposed at opposite s1des of the web 5 andadjustable relative thereto by means of. oval slots 12 and holding bolts13 which secure them to the sides of the frame 1. It will be understood,of course,

that by reason of the fact that theblock is semicircular and that theperiphery of the member 3 is semicircular, the block 11 and the member 3canbe concentric only in one position of the block and that the ovalslotting permits veryaccurate adjustment.

However, when the block 11 is shifted below the center of rotation ofthe blank carrier the space between the surface of the block immediatelyabove the axis and the inner wall of the rim of. the blank carrier willbe greater than the space between the corre-* sponding surfaces at apoint in a horizontal plane passing through the axis. The result is thata blank inserted within the slot will gradually be fed outwardly as ittravels around to the horizontal plane above mentioned due to thedecreased space between the block 11 and carrier. This provides anautomatic feed for the blank as it travels 1I1lJO successive engagementwith roller dies.

Mounted on shafts 14: which are jour the eccentrical positioning of thesleeve 15 in thebushing 16, it will be evident that the position of therollersmay be varied relative to the shaft 2 and for the purpose ofcooper-1 ating in the adjustment and locking of the bushings 16 in adusted position, they are provlded with flanges 19 in which are formed aseries of holes 20 adapted to cooperate with a series of differentlyspaced holes 21 in the side members of the frame 1 and .machine screwsof cap bolts 22 inserted through the several holes 20 and 21 may serveto, retain the bushings in their several adjusted positions. bymeans ofa gear 2-3 secured thereto, which gearis driven by smallergear: 24carried on a shaft- 25; The latter is provided with a gear 26mesh1ngwith a punch 27 on a Cll'lV ing shaftl28 and thedrivinglshaft 28- is Theshaft 2 is driven;

driven by a pulley wheel 29. After the bits have. moved around'beyondthe last die a? they are discharged by gravity to a chute formed inframe 1.

From the foregoing description the mode of operation of this mechanismwill be readily apparent. Let it be assumed that the member 11 is soadjusted relative to the member 3 that the exterior periphery of themember 11 is concentric with the periphery of the member 3. As a resultof this construction heated blanks carried in the slots 7 will not havetheir relation to the inner end of the slots changed during rotation ofthe member 3. Thebushings 16 will be adjusted in such manner as to bringthe left hand or toproller 17 (Fig. 1) into a position such as toperformthe first operation on the blank. The second or middle roller isadjusted slightly nearer the periphery of the member 3 and the thirdroller 'rolls substantially in contact therewith. As a result the threerollers will successively be engaged by a heated blank carried by themember 3 and will cooperate with thesurfaces 9 in the forming of a bithaving a point bent at an angle to the body of the bit and tapering fromthe body to the end of the point. It will also be evident that if thebushings 16 be adjusted to bring the axes of the dies 17 equidistantfrom the shaft 2, the blocks 11 may be lowered slightly and the bitswill be progressively formed by the successive dies 17.. as the bitswill'be protruded progressively further, by reason of the eccentricity.of

blocks 11 as they travel from a vertical to a horizontal position. Somevariations in length of bits may be also secured by appropriateadjustments of blocks 11. and dies 17.

In the presentndevice, two series of slots 7 and two seriesof rollers 17are provided, but it will be evident that this number may be increasedas desired, or, if desired. but a single series of rolls and slots needbe employed. The insertion of the blanks is accomplished by shoving themin as the empty slots are approaching the first roller 17 and the blocksare automatically discharged by gravity as they pass below thehorizontal line.

While I have in this application specifically described one form whichmy invention may assume in practice, it will be understood that thisform of the same is shown for purposes of illustration and that theinvention may be modified and embodied in other forms without departingfrom its spirit or the scope of theappcnded claims. 7 v

What I claim as new and desire to secure by Letters Patent is: i

1. In a tool forging machine, arelatively stationary. die means forforming the lateral surfaces of a tool, a diefor supporting the frontface of the tool and adapted to interfit with said first 'mentioned diemeans, and

means for moving the supporting die relative to the stationary diewhereby shaping of the cutting end of the tool is effected.

2. In a tool forging machine, a plurality of relatively stationary diesfor forming the lateral surfaces of the tool, a die for supporting thefront face of the tool and adapted to interfit with said stationarydies, and means for moving the supporting die in a path adjacent saidstationary dies, the supp rting die interfitting with ea h stationarydie in succession.

3. A forging machine comprising a rotatable grooved forming die adaptedto form the sides of the cutting portion of a blank. a second die havinga raised portion adapterl to extend within the groove of said other dieto form said cutting portion, and means for causing relative curvilinearmovement between said latter die and the axis of said rotatable die.

1. A forging machine comprising a rotatable grooved forming die adaptedto form the sides of the cutting portion of a blank, a second die havinga raised portion extending within the groove of said other die to formsaid cutting portion, and means for causing continuous relativecurvilinear movement between said latter die and theaxis of saidrotatable die.

A, forging machine comprising rotatable die means having sides, theconformation of which is substantially the Same as that of the sides ofthe cutting portion of a bit formed thereby. a raised die having sideswhose conformation is substantially the same as the sides of saidrotatable die, and means whereby said dies are brought into operativerelation to forge a blank and thereafter adapted to have a positivevertical separation therebetween.

6. A forging machine comprising a blank carrier, a raised die associatedtherewith. and a relatively stationary rotatable forming die having agroove into which extends said raised die to form the cutting face andsides of the cutting portion of a bit.

7. A, forging machine comprising a blank carrier. a plurality of raiseddies associated therewith. and a relatively stationary rotatable formingdie having a groove into which extend said raised dies to form thecutting face and sides of the cutting portion of a bit.

8. A forging machine. comprising a blank carrier, a plurality of raiseddies asso iated therewith. and relatively stationary rotatable formingdies having a groove into which extend said raised dies to form thecutting face and sides of the cutting portion of a bit. said roller diesbeing adapted to perform successive degrees of forging on a blank.

9. A forging machine comprising a blank carrielx'a plurality of raiseddies associated therewith, and relatively stationary rotatfit) ableforming dies having a groove into which extend said raised diesto formthe cutting face and sides of the cutting portion of a bit, one of saidraised dies having its longitudinal axis disposed in one plane andcooperating with one of said roller dies in said plane and another ofsaid raised dies cooperating with another of said roller dies in anotherplane parallel to said first mentioned plane.

10. In a tool forging machine, a relatively stationary die means forforming the lateral surfaces of a tool, a die which interfits with saidstationary die means, means for supporting the tool for engagement bysaid die during the forging operation, and means for moving the seconddie relative to the stationary die means.

i 11. A forging machine comprising a relatively stationary die meanshaving sides the conformation of which is substantially the same as thatof the sides of the cutting portion of a bit formed thereby, arelatively movable raised die having sides whose con" formation issubstantially.complemental to that of the sides of said stationary diemeans, andmeans for moving said raised, die into operative relation withsaid stationary die to forge ablank.

12. In a tool forging machine, a blank carrier adapted to move a toolblank bodily in a fixed path and having means for sup porting the blankat an acute angle relative to said path, and a relatively stationary diemeans for forming the lateral surfaces of the blank, said relativelystationary die means being disposed for engagement by a blank moving insaid carrier thereby to form the cutting portion of the tool withclearance.

13. In a forging machine, a blank carrier adapted to move a blank bodilyin a fixed path and having means for supporting the blank at an acuteangle relative to said path, a relatively stationary die means forforming the lateral surfaces of the blank, said relatively stationarydie means being disposed for engagement by a blank moving in saidcarrier thereby to form the cutting portion of the bit with clearance,and means for adjusting said die means to vary its effecton said blank.

14. In a tool forging machine, a blank carrier adapted to moye a toolblank bodily in a fixed path and having meansfor supporting the blank atan acute angle relative to said path, and a series of relativelystationary die means for forming the lateral surfaces of the blank, saidrelatively stationary die means being disposed' for successiveengagementby a blank mo ing in said carrier thereby to form the cutting portion ofthe tool with clearance.

15. In atool forging machine, a rotating blank carrier adapted tosupport a blank at "travel thereof, and a series of relativelystationary die means for forming the lateral. surfaces of the blank,said relatively stationary die means being disposed for successiveengagement by a blank moving in said carrier thereby to form the cuttingportion of the bit withclearance. 1

17. In a cutter bit forging machine, a blanksupport, cutter bit forgingdie means,

means for causing relative movement between said support and die'm'eansto effect a forging operation of the blank, and means for feeding ablank relative to the die means automatically during said relativemovement. V

18. In a cutter bit forging machine, a blank carrier, cutter bit forgingdie means, and means for automatically feeding :a blank during theforging operation.

19. In a cutter bit forging machine, a

blank carrier, cutter bit forging die means,

feed of a blank carried in said blank carrier in the interval betweenthe initiation of forging and the completion of the bit.

20. In a forging maehine, a blank carrier adapted to move a blank bodilyin :a

'rotarypath, means adjustable to move said blanks towards the peripheryof said path during movcmentgin said, path, and die meansfor engaging ablank at different points in said path. r

21. In a forging machine, a blank car rier adapted to move ablankbodilyin rotary path, means adjustable to move said blanks towards theperiphery of said path during movement in said path, and die means forengaging a blank at different points in said path and adjustable towardsand means automaticallyoperative to effect successive engagement by ablank moving in i said path andicooperating with said support ing die inthe formation of saidblank to a desired shape. y

23. In a cutter bit forging machine, a die carrier provided with aninclined slot for re ceiving the shank ofa bit blank and further alongits longitudinal axis during the forghaving a die adapted to support theextremity ofa blank during the forging operation, means for impartingmovement to said (110, and a plurality of die means disposed along thepath of said die so as to be successively engaged by the bit blank beingforged, said die means having converging die surfaces adapted to-engagethe sides of the bit and cooperatingj with said blank supporting die toimpart an outward taper to the end of a blank, the inclination of saidslot causing the longitudinal axis of a blank therein to makeduringforging by each of said die meansian angle with the normal to its pathat its points of contact with said die means.

24. Ina cutter bit forging machine, a die carrier provided with a seriesof inclined slots for receiving the shanks of bit blanks and furtherhaving for each slot a die adapted tosupport the extremity of therespective blank during-the forging operation, means for impartingorbital movement to said dies, and die meansdisposed along the orbit soas to be successively engaged by the bit blanks being forged,said diemeans having converg ingdie surfaces adapted to engage the sides of thebitand cooperating with said blank supporting dies to impart an outwardtaper to the ends of said blanks, said die carrier being arranged toautomatically discharge the finished bits from said slots before theorbit is completed.

25. In a forging machine, a die carrier provided with a plurality ofseries of raised blank supporting dies, means for moving said carrier tocause said dies to traverse fixed parallel paths, means for supportingeach of said blanks at an acute angle relative to said path, and grooveddie means disposed for successive engagement by blanks moving acrosssaid path and cooperating with said supporting dies in the formation ofthe sides of the cutting portion of said blanks and to forge clearancefor the cutting portion of the bit.

26. In a forging machine, a blank carrier having means to engage thecutting faces of a plurality of blanks carried thereby, means to forgesaid blanks, means for normally causing relative curvilinear movementbetween said forging means and blanks, and means including a stationaryelement for controlling the position of said blanks relative to saidforging dies.

27. A forging machine comprising a blank carrier having a raised dieassociated therewith to form the cutting portion of a bit, rotatable diemeans adapted to cooperate with said raised die to form said cuttingportion, means for causing relative curvilinear movement between theaxis of said rotatable forming means and said blank caring operaton.

28. In a forging machine, a blank carrier. a raised the associatedtherewith, rotatable die means adapted to have interfitting relationwith said raised die to form the cutting portion of a cutter bit, androtatable means associated with said rotatable die for adjusting thedisposition thereof with respect to said raised die to vary the degreeof interfitting.

29. In a forging machine, a blank carrier, a raised die associatedtherewith. rotatable die means adapted to have interlilting relationwith said raised die to form the cutting portion of a cutter bit, andmeans adjustable to effect a variation in the extent of inter fitting ofsaid die and die means, said adjustable means having throughout aforging operation a fixed adjusted position.

30. In a cutter bit forging machine, a bit blank carrier. :1 groovedrotatable forming die to forgo the cutting portion of a blank carried bysaid carrier, means for supporting said blank by said carrier wherebythe cutting portion is forged with clearance, means for causing relativecurvilinear movement between said rotatable die and blank. and meansadapted to abut the end of a blank during the forging operation.

31. In a forging machine, a blank carrier, :1 grooved rotatable formingdie to forge the cutting portion of a blank carrier thereby, means forsupporting said blank by said carrier whereby the cutting. portion isforged with clearance, means for causing relative curvilinear movementbetween said rotatable die and blank, and means including a stationaryelement adapted to abut the end of a blank during the forging operationand to automatically disengage the same when the forging operation iscompleted.

32. In a forging machine. a blank carrier adapted. to move along a fixedpath. dies to forge blanks carried by said carrier,'and means adapted tobe movable independently of said carrier for engaging one end of saidblanks.

33. In a forging machine, a rotary blank carrier, dies to forgo theblanks, one of said dies having a projecting surface adapted to projectinto a recess in another die, said dies being arranged at predetermineddistances from the center of rotation of said carrier, and means toadjust the position of the blanks away from the center of relation ofsaid carrier.

34. In a forging machine. a blank carrier movable along a fixed path,dies to forge blanks carried by saidcarrier, and a member for adjustingthe position of the blanks having a fixed position relative to saidcarrier.

35. In a forging machine, a blankcarrier movable along a fixed path,dies to forge Hill blanks carried by said carrier, and a menr her foradjusting the position of the blanks carried by said carrier, saidmember in cluding a segment and means for holding the same initsdifferent operative positions.

36. In a forging machine, a rotatable blank carrier having a pluralityof axially spaced blank receiving means, blank adjust-ing means actingto effect longitudinal adjustment of the blanks carried thereby, and diemeans for forging said blanks.

37. In a forging machine, a rotatable blank carrier having a pluralityof axially spaced blank receiving means, blank ad justing meansprojecting axially inwardly of said carrier, and axially spacedrotatable die means for forging said blanks.

38. In a forging machine, a rotatable blank carrier having a pluralityof axially spaced blank receiving means, blank adjusting meansprojecting axially inwardly of said carrier, and die means for forgingsaid blanks.

39. In a forging machine, a rotatable blank carrier having a pluralityof axially spaced blank receiving means and recesses, blank adjustingmeans disposed in the recesses in said carrier, and die means forforging said blanks.

40. In a forging machine, a supporting frame, a rotatable blank carriermounted thereon, said carrier having blank receiving means, blankadjustingmeans mounted on said frame for adjusting the blanks in saidblank receiving means, and die means for forging said blanks.

$1. In a forging machine, a supporting frame, a rotatable blank carriermounted on said frame and having an annular recess therein, said carrierhaving blank receiving means communicating with said recess, blankadjusting means mounted on said frame and projecting into said recessand beneath said blank receiving means, and die means for forging saidblanks.

42. In a forging machine, means for supporting blanks during forgingproviding a plurality of blank receiving means each having a raised dieassociated therewith disposed in a plurality of planes, forging diemeans for forging the blanks disposed in said receiving means, said diemeans having grooves into which said raised dies are adapted to extend,and means for effecting relative movement between said raised dies andsaid die means.

43. In a forging machine, means for supporting blanks during forgingproviding a plurality of blank receiving means each havplanes, androller dies having grooves into which extend said raised dies forforging blanks disposed in said receiving means.

It. In a forging machine, means for supporting blanks during forgingproviding a plurality of blank receiving means each having a raised dieassociated therewith, and means including a roller die having a grooveinto which said raised dies are adapted to extend for forgingsimultaneously to the same degree a plurality of blanks disposed in saidreceiving means.

l5. In a forging machine, means for supporting blanks during forgingproviding a plurality of blank receiving means each having a raised dieassociated therewith, means for forging a plurality of blanks disposedin said receiving means, said forging means including a plurality ofgrooved roller dies for performing the same degree of forging 011 eachof said blanks, said raised dies being adapted to extend within thegrooves in said roller dies, and means for eifectingrelative movementbetween said raised dies and said roller die.

46. In a forging machine, means for supporting blanks during forgingproviding a plurality of blank receiving means each having a raised dieassociated therewith of substantially the same cross section as thecutting portion of the bit formed thereby, said dies being disposed in aplurality of planes, and die means operating on blanks therein includinga plurality of rotatable dies each having a groove to cooperate with araised die.

47. A forging machine for forming the cutting ends of cutter bitscomprising a die against which the front face of the bit portion is tobe formed, die means including a plurality of grooved dies for formingthe a other surfaces of the cutting end, and means for causing relativemovement between said die and die means to effect forming of saidcutting ends.

48. A. forging machine for forming the cutting ends of cutterbitscomprising a die against which the front face of the bit por-. tionis to be formed, die means including. a plurality of grooved dies forforming the other surfaces of the cutting end, each of said plurality ofdies successively operating upon a single blank, and means for causingrelative movement between said die and die means to effect forming ofsaid cutting ends.

In testimony whereof I affix my signature.

I SVEN T. NELSON.

